Articles | Volume 22, issue 24
https://doi.org/10.5194/acp-22-15703-2022
https://doi.org/10.5194/acp-22-15703-2022
Research article
 | 
15 Dec 2022
Research article |  | 15 Dec 2022

Aerosol optical depth regime over megacities of the world

Kyriakoula Papachristopoulou, Ioannis-Panagiotis Raptis, Antonis Gkikas, Ilias Fountoulakis, Akriti Masoom, and Stelios Kazadzis

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Cited articles

Abera, A., Friberg, J., Isaxon, C., Jerrett, M., Malmqvist, E., Sjöström, C., Taj, T., and Vargas, A. M.: Air Quality in Africa: Public Health Implications, Annu. Rev. Publ. Health, 42, 193–210, https://doi.org/10.1146/annurev-publhealth-100119-113802, 2020. 
Alpert, P., Shvainshtein, O., and Kishcha, P.: AOD Trends over Megacities Based on Space Monitoring Using MODIS and MISR, Am. J. Clim. Chang., 01, 117–131, https://doi.org/10.4236/ajcc.2012.13010, 2012. 
Che, H., Gui, K., Xia, X., Wang, Y., Holben, B. N., Goloub, P., Cuevas-Agulló, E., Wang, H., Zheng, Y., Zhao, H., and Zhang, X.: Large contribution of meteorological factors to inter-decadal changes in regional aerosol optical depth, Atmos. Chem. Phys., 19, 10497–10523, https://doi.org/10.5194/acp-19-10497-2019, 2019. 
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Short summary
Megacities' air quality is determined by atmospheric aerosols. We focus on changes over the last two decades in the 81 largest cities, using satellite data. European and American cities have lower aerosol compared to African and Asian cities. For European, North American and East Asian cities, aerosols are decreasing over time, especially in China and the US. In the remaining cities, aerosol loads are increasing, particularly in India.
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